Jig.



II. H. RICHARDS.

IIG.

. I APPLICATION FILED MAR. 31,1916. 1,230,433. Patented June 19, 1917.

2 SHEETS-SHEET. I.

mam/0r R. H. RICHARDS.

.HG. APPLICATION men MAR. 3|. 1916.

1,230,433; Patented Jun19, 1917.

2 SHEETS-SHEET 2.

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ROBERT HALLOWELL RICHARD-S, 0F BOSTON, MASSACHUSETTS.

JIG.

Specification of Letters Patent.

Patented June 19, 1917.

Application filed March 31, 1916. Serial No. 88,033.

To all whom it may concern:

Be it known that 1, ROBERT H. RICHARDS, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented a certain new and useful Improvement in Jigs, of which thefollowing is a specification.

My invention relates to jigs, and particularly to the dischargemechanism thereof. While not limited in its utility to use with jigsofthe pulsator type, it attains its fullest advantages when combinedwith such jigs and I illustrate it in this relation.

Briefly stated, the invention involves the use of a pan or cup dischargefor the concentrates, the pan or cup being rocked or oscillated towardand from the discharge orifice. Additional features of the inventioninvolve the general arrangement of the jig structure to permit the bestuse of this discharge.

A successful embodiment of the invention is illustrated in theaccompanying drawings in which:

Figure 1 is an elevation of the complete device looking at the dischargeend;

Fig. 2 is a side elevation of the same;

Fig. 3 is a fragmentary perspective showing the discharge mechanism; and

Fig. 4 is a fragmentary vertical section through the hutch, screen anddischarge chambers.

In the drawings, 6 represents the hutch casting, which is supported onthe frames 7. Connected to the hutch casting 6 by means of lugs andtaper keys 8 is the screen box 9 carrying a screen 10 of suitable mesh.Material to be treated in the jig is fed to a box 11 bolted to thescreen box as shown and discharging directly into the screen box at thescreen level. The discharge from the screen is partly. into and partlyover a pocketed casting 12 bolted to the screen box 9, the tailingpassing over the casting 12 and out through a spout. 13 formed thereon,and the concentrate flowing from the screen into a chamber or pocket 14.

The opening l5vleading fromthe screen box 9 to chamber 14% of casting 12extends the entire width of the screen. Where no lag bed is to be usedthe bottom of opening 14 is at the screen level, as shown, but where alag bed is to be used the screen is set lower than the bottom of opening14 so that the bed will be retained, as is usual in this art. Theopening 15 is adjusted by a or pocket 14 is constantly verticallyadjustable plate 16 which serves to define the line of division betweenconcentrate and tailing. A vent pipe 17 is provided to prevent thetrapping of air in the chamber 14 and extends upward above the level ofthe tailing flowing out through spout 13.

The jigging action is secured by a pulsator valve mechanism such asdescribed and claimed in my prior Patents No. 901,174, dated October 20,1908, and No. 901,47 5, dated October 20, 1908. This mechanism need nottherefore be described in detail here. It involves a rotary balancedvalve 18 placed just beyond an air chamber 19 in a supply pipe 20through which water reaches the valve under suitable head. The valve 18is rotated at proper speed by a belt (not shown) running on the wheel 21and delivers water in successive unidirectional pulses near the bottomof hutch '6. The air chamber 19 relieves water hammer in the supply pipe20 and intensifies the pulsing action. An air vent Valve'22 permits therelease of air from chamber 19 to adjust the length of the air column. Astop valve 23 controls the rate of water flow;

While as above stated the pulsingwater enters the hutch'6 near thebottom thereof, there is a pocket 24: at the extreme bottom to catch thehutch concentrate which passes through the'screen and downward throughthe pulsing water. From here it is drawn off through the opening 25.

.Theconcentrate which enters the chamber drawn off through a pipedischarge 26 which extends downward therefrom. The pipe 26'dips into apan 27 having an overflow barrier 28 at one end over which barriertheconcentrate discharges. vThepan 27-is' pinned at one end to the links 29which at their other ends are pinned to the yoke 30. The yoke 30 iscarried on a rod 31 which is vertically adjustable in guides 32 on thecasting 12 and is supported therein by a nut wheel 33 threaded on theend ofrod 31 and bearing against the upper one of the guides 32. Awingnut 34 also threaded on rod 31 serves to clamp wheel 33 inadjustment.

The end of pan 27 remote'from links 29 is'mounted on a crank 35 which isformed on the end of shaft 36; This shaft 36 turns in bearings 37 on thehutch casting 6 and carries a belt wheel 38. The hub of pulley groovedat 39 and a belt 40 runs in I this groove and around wheel 38 so thatshaft 36 is driven at a relatively slow rotative speed when the rotaryvalve is driven.

In the operation of the the rotary valve is driven at the proper speedand the stop valve is opened to admit water at the proper rate. Thiscauses the pulsing upward water flow through the screen, characteristicof this type of jig. Material to be treated fed to the teed box 11 andflows from there across the screen 10. The lighter particles are carriedto the top and the heavier settle to the screen, so that the lighterparticles flow out over the overflow l3 and the heavier enter thechamber ll.

The heavier particles, which form the concentrate are discharged fromchamber let through the pipe 26 to the pan 27. The oscillation oil? thispan toward and from the end of pipe 26 under the action of crank keepsthe pipe from clogging and causes the particles of concentrate graduallyto overflow barrier 28 to a suitable receptacle or launder (not shown).By turning hand wheel the pan 27 may be adjusted to and from the end ofpipe 26 to vary the rate of discharge of concentrate.

lVhile the oscillation of the pan toward and from the end of pipe 26 isregarded as the movement most vitally important to the dischargingaction, it should be noted that the pan has a compound movement, due toits direct connection with the crank The pan moves in an oval path withreference to the end of the pipe, so that it oscillates toward and fromthe end of the pipe and also transversely with reference thereto. Thistransverse movement produces a shifting of the discharged material inthe pan which facilitates the discharge of succeeding portions of theconcentrate.

The discharge arrangement above described gives freedom from clogging,and reduces the quantity of water flowing out with the concentrate. Therate of discharge is readily adjusted and all working parts are visibleand accessible. In case it is desired to stop the discharge ofconcentrate this can be done at once and without destroying anyadjustments by merely drawing up rod 31 until the pan 27 closes pipe 26.

The discharge mechanism is not restricted in its utility to jigs inwhich the concentrate is taken oil at the tail end of the as hereillustrated nor to pulsator jigs, as its advantages may be realized inwhole or in part when applied to other types of Having thus described myinvention, what I claim is l. The combination of a jig including theusual screen; a chamber for receiving the heavier materials flowing fromsaid screen; a depending discharge tube leading from. said chamber; apan into which said tube dips, said panhaving a barrier for retaining abed of discharging material around the depending end of said tube; andmeans tor reciprocating said pan toward and from the end of said tubewhile the ig is in operation.

2. The combination of a including the usual screen; a chamber forreceiving the heavier material flowing from said screen; a dependingdischarge tube leading from said chamber; a pan into which said tubedips, said pan having a barrier for retaining a bed of dischargingmaterial around the depending end of said tube; means for reciprocatingsaid pan toward and from the end of said tube while the jig is inoperation; and means for adjusting said pan toward and from the end orsaid tube for adjusting the rate of discharge.

3. The combination of a jig including the usual screen; a chamber forreceiving the heavier materials flowing from said screen; a dependingdischarge tube leading from said chamber; a pan into which said tubedips; a swinging link supporting one end of said pan; means foradjusting said link to move said pan toward and from the end of saidtube; a rotatable member having a crank pin journaled in the other endof said pan; and means for rotating said member.

l. The combination of a jig including the usual screen; a chamber forreceiving the heavier materials flowing from said screen; a dependingdischarge tube leading from said chamber; a pan into which said tubedips, said pan having a barrier for retaining a bed of dischargingmaterial around the end of said tube; and means for oscillating said panwith a compound movement in an endless loop path toward and from the endof said tube and transversely with reference thereto while the jig is inoperation.

5. The combination of a jig including the usual screen; a chamber forreceiving the heavier materials flowing from said screen; a dependingdischarge tube leading from said chamber; a pan into which said tubedips; a swinging supporti'or one end of said pan; a crank directlyconnected to the other end of said pan to support the same; and meansfor rotating said crank.

(3. The combination. of a stratifying separator; a chamber for receivingthe heavier materials flowing from said separator; a depending dischargetube leading from said chamber; a pan into which said tube dips, saidpan having a barrier for retaining a bed of discharging material aroundthe depending end of said tube; and means for reciprocating said pantoward and from the end of said tube while the is in operation.

7. The combination of a stratifying separator; a chamber for receivingthe heavier materials flowing from said separator; a depending dischargetube leading from said chamber; a pan into which said tube dips, saidpan having a barrier for retaining a bed of discharging material aroundthe depending end of said tube; means for reciprocating said pan towardand from the end of said tube while the jig is in operation; and meansfor adjusting said pan toward and from the end of said tube foradjusting the rate of discharge.

8. The combination of a stratifying separator; a chamber for receivingthe heavier materials flowing from said separator; a depending dischargetube leading from said chamber; a pan into which said tube dips; aswinging link supporting one end of said pan; means for adjusting saidlink to move said pan toward and from the end of said tube; a rotatablemember having a crank pin journaled in the other end of said pan; andmeans for rotating said member.

9. The combination of a stratifying separator; a chamber for receivingthe heavier materials flowing from said separator; a depending dischargetube leading from said chamber; a pan into which said tube dips, saidpan having a barrier for retaining a bed of discharging material aroundthe end of said tube; and means for oscillating said pan with a compoundmovement in an end less loop path-toward and from the end of said tubeand transversely with reference thereto while the jig is in operation.

10. The combination of a stratifying separator; a chamber for receivingthe heavier materials flowing from said separator; a depending dischargetube leading from said chamber; a pan into which said tube dips; aswinging support for one end of said pan; a crank directly connected tothe other end of said pan to support the same; and means for rotatingsaid crank.

In testimony whereof I have signed my name to this specification.

ROBERT HALLOWELL RICHARDS- Gopies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents, Washington,D. G.

